Introduction
Classification
based on voltage and location; Components; Types of Circuit Breakers (Air,
MOCB, SF6 and
Vacuum); Rating specifications and their practical meanings, Break
current, Make current; Reading of Power
and Control diagram of Switchgears.
Testing
Routine
maintenance test; Visual and mechanical inspection; Breaker testing, IR, PI
in open and closed status, High-Pot, Contact resistance measurement, Time
travel analysis, Thermo graphic survey of joints; C.T. testing, IR, Ratio
checks, Saturation characteristics, Secondary winding resistance; PT
testing, IR, Ratio checks; Protective relays, functional operation.
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